Monte Carlo simulation of negative ion production in the negative hydrogen ion source

M. Uematsu, T. Morishita, Akiyoshi Hatayama, T. Sakurabayashi, M. Ogasawara

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Two Monte Carlo simulation codes: (a) neutral transport code and (b) negative ion (H-) transport code, have been developed to understand transport phenomena in negative ion sources. In the neutral transport code, Boltzmann equations for hydrogen molecules (H2) and atoms (H) are solved. Three dimensional (3D) spatial distributions of H2, H, and H- production are obtained for a tandem negative ion source. The volume production of H- is limited to the area around the gas inlet in the first chamber and near the plasma grid in the second chamber. On the other hand, distribution of H- surface production is shown to be almost uniform over all the plasma grid surface. In the negative ion code, H- trajectories are calculated by numerically solving the 3D equation of motion for H- ions. The effects of the magnetic filter on the extraction probability of surface produced H- ions are mainly studied. The dependence of the extraction probability on the field strength is small.

Original languageEnglish
Pages (from-to)883-886
Number of pages4
JournalReview of Scientific Instruments
Volume71
Issue number2 II
Publication statusPublished - 2000 Feb

Fingerprint

Ion sources
hydrogen ions
negative ions
ion sources
Negative ions
Hydrogen
simulation
Magnetic filters
Plasmas
chambers
grids
Boltzmann equation
Ions
Spatial distribution
Equations of motion
Trajectories
field strength
spatial distribution
ions
equations of motion

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Instrumentation

Cite this

Uematsu, M., Morishita, T., Hatayama, A., Sakurabayashi, T., & Ogasawara, M. (2000). Monte Carlo simulation of negative ion production in the negative hydrogen ion source. Review of Scientific Instruments, 71(2 II), 883-886.

Monte Carlo simulation of negative ion production in the negative hydrogen ion source. / Uematsu, M.; Morishita, T.; Hatayama, Akiyoshi; Sakurabayashi, T.; Ogasawara, M.

In: Review of Scientific Instruments, Vol. 71, No. 2 II, 02.2000, p. 883-886.

Research output: Contribution to journalArticle

Uematsu, M, Morishita, T, Hatayama, A, Sakurabayashi, T & Ogasawara, M 2000, 'Monte Carlo simulation of negative ion production in the negative hydrogen ion source', Review of Scientific Instruments, vol. 71, no. 2 II, pp. 883-886.
Uematsu M, Morishita T, Hatayama A, Sakurabayashi T, Ogasawara M. Monte Carlo simulation of negative ion production in the negative hydrogen ion source. Review of Scientific Instruments. 2000 Feb;71(2 II):883-886.
Uematsu, M. ; Morishita, T. ; Hatayama, Akiyoshi ; Sakurabayashi, T. ; Ogasawara, M. / Monte Carlo simulation of negative ion production in the negative hydrogen ion source. In: Review of Scientific Instruments. 2000 ; Vol. 71, No. 2 II. pp. 883-886.
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